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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Drop all SCM attributes for SOCKMAP.\n\nSOCKMAP can hide inflight fd from AF_UNIX GC.\n\nWhen a socket in SOCKMAP receives skb with inflight fd,\nsk_psock_verdict_data_ready() looks up the mapped socket and\nenqueue skb to its psock-\u003eingress_skb.\n\nSince neither the old nor the new GC can inspect the psock\nqueue, the hidden skb leaks the inflight sockets.  Note that\nthis cannot be detected via kmemleak because inflight sockets\nare linked to a global list.\n\nIn addition, SOCKMAP redirect breaks the Tarjan-based GC\u0027s\nassumption that unix_edge.successor is always alive, which\nis no longer true once skb is redirected, resulting in\nuse-after-free below. [0]\n\nMoreover, SOCKMAP does not call scm_stat_del() properly,\nso unix_show_fdinfo() could report an incorrect fd count.\n\nsk_msg_recvmsg() does not support any SCM attributes in the\nfirst place.\n\nLet\u0027s drop all SCM attributes before passing skb to the\nSOCKMAP layer.\n\n[0]:\nBUG: KASAN: slab-use-after-free in unix_del_edges (net/unix/garbage.c:118 net/unix/garbage.c:181 net/unix/garbage.c:251)\nRead of size 8 at addr ffff888125362670 by task kworker/56:1/496\n\nCPU: 56 UID: 0 PID: 496 Comm: kworker/56:1 Not tainted 7.0.0-rc7-00263-gb9d8b856689d #3 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\nWorkqueue: events sk_psock_backlog\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl (lib/dump_stack.c:122)\n print_report (mm/kasan/report.c:379)\n kasan_report (mm/kasan/report.c:597)\n unix_del_edges (net/unix/garbage.c:118 net/unix/garbage.c:181 net/unix/garbage.c:251)\n unix_destroy_fpl (net/unix/garbage.c:317)\n unix_destruct_scm (./include/net/scm.h:80 ./include/net/scm.h:86 net/unix/af_unix.c:1976)\n sk_psock_backlog (./include/linux/skbuff.h:?)\n process_scheduled_works (kernel/workqueue.c:?)\n worker_thread (kernel/workqueue.c:?)\n kthread (kernel/kthread.c:438)\n ret_from_fork (arch/x86/kernel/process.c:164)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:258)\n \u003c/TASK\u003e\n\nAllocated by task 955:\n kasan_save_track (mm/kasan/common.c:58 mm/kasan/common.c:78)\n __kasan_slab_alloc (mm/kasan/common.c:369)\n kmem_cache_alloc_noprof (mm/slub.c:4539)\n sk_prot_alloc (net/core/sock.c:2240)\n sk_alloc (net/core/sock.c:2301)\n unix_create1 (net/unix/af_unix.c:1099)\n unix_create (net/unix/af_unix.c:1169)\n __sock_create (net/socket.c:1606)\n __sys_socketpair (net/socket.c:1811)\n __x64_sys_socketpair (net/socket.c:1863 net/socket.c:1860 net/socket.c:1860)\n do_syscall_64 (arch/x86/entry/syscall_64.c:?)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nFreed by task 496:\n kasan_save_track (mm/kasan/common.c:58 mm/kasan/common.c:78)\n kasan_save_free_info (mm/kasan/generic.c:587)\n __kasan_slab_free (mm/kasan/common.c:287)\n kmem_cache_free (mm/slub.c:6165)\n __sk_destruct (net/core/sock.c:2282 net/core/sock.c:2384)\n sk_psock_destroy (./include/net/sock.h:?)\n process_scheduled_works (kernel/workqueue.c:?)\n worker_thread (kernel/workqueue.c:?)\n kthread (kernel/kthread.c:438)\n ret_from_fork (arch/x86/kernel/process.c:164)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:258)"
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    "dateReserved": "2026-06-09T07:44:35.377Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/virtio: use uninterruptible resv lock for plane updates\n\nvirtio_gpu_cursor_plane_update() and virtio_gpu_resource_flush() lock\nthe framebuffer BO\u0027s dma_resv via virtio_gpu_array_lock_resv() and\nignore its return value. The function can fail with -EINTR from\ndma_resv_lock_interruptible() (signal during lock wait) or with\n-ENOMEM from dma_resv_reserve_fences() (fence slot allocation),\nleaving the resv lock not held. The queue path then walks the object\narray and calls dma_resv_add_fence(), which requires the lock held;\nwith lockdep enabled this trips dma_resv_assert_held():\n\n  WARNING: drivers/dma-buf/dma-resv.c:296 at dma_resv_add_fence+0x71e/0x840\n  Call Trace:\n   virtio_gpu_array_add_fence\n   virtio_gpu_queue_ctrl_sgs\n   virtio_gpu_queue_fenced_ctrl_buffer\n   virtio_gpu_cursor_plane_update\n   drm_atomic_helper_commit_planes\n   drm_atomic_helper_commit_tail\n   commit_tail\n   drm_atomic_helper_commit\n   drm_atomic_commit\n   drm_atomic_helper_update_plane\n   __setplane_atomic\n   drm_mode_cursor_universal\n   drm_mode_cursor_common\n   drm_mode_cursor_ioctl\n   drm_ioctl\n   __x64_sys_ioctl\n\nBeyond the WARN, mutating the dma_resv fence list without the lock\nraces with concurrent readers/writers and can corrupt the list.\n\nBoth call sites run inside the .atomic_update plane callback, which\nDRM atomic helpers do not allow to fail (by the time it runs, the\ncommit has been signed off to userspace and there is no clean\nrollback path). Moving the lock acquisition to .prepare_fb was\nrejected because the broader lock scope deadlocks against other BO\nlocking paths in the same atomic commit.\n\nIntroduce virtio_gpu_lock_one_resv_uninterruptible() that uses\ndma_resv_lock() instead of dma_resv_lock_interruptible(). This\neliminates the -EINTR failure mode -- the realistic syzbot trigger\n-- without extending the lock hold across the commit. The helper\nlocks a single BO and rejects nents \u003e 1 with -EINVAL; both fix\nsites lock exactly one BO.\n\nUse it from virtio_gpu_cursor_plane_update() and\nvirtio_gpu_resource_flush(); check the return value to handle the\nremaining -ENOMEM case from dma_resv_reserve_fences() by freeing\nthe objs and skipping the plane update for that frame. The\nframebuffer BOs touched here are not shared with other contexts\nand lock contention is expected to be brief, so the loss of\nsignal-interruptibility is acceptable.\n\nOther callers of virtio_gpu_array_lock_resv() (the ioctl paths)\ncontinue to use the interruptible variant.\n\nThe bug was reported by syzbot, triggered via fault injection\n(fail_nth) on the DRM_IOCTL_MODE_CURSOR path, which forces the\n-ENOMEM branch in dma_resv_reserve_fences()."
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              "value": "AV:L - Triggered through the AMDKFD_IOC_CREATE_QUEUE ioctl on the local /dev/kfd character device; the attacker-controlled ctx_save_restore_size field comes straight from the ioctl argument struct with no remote reachability.\nAC:L - The overflow is pure deterministic arithmetic on a value the attacker fully controls \u2014 passing ctx_save_restore_size near 2^32 (or /NUM_XCC on multi-XCC MI300 parts) reliably wraps total_cwsr_size to 0 or a small value on every attempt, with no race or layout dependency.\nPR:L - Requires only an unprivileged local account with access to /dev/kfd, which is granted to the render group and is routinely available to ordinary users on ROCm hosts, GPU compute nodes, containers, Steam Deck/desktop and Chrome OS style systems; no capabilities are checked on this path.\nUI:N - The attacker creates the malicious compute queue entirely from its own process via a single ioctl; no action by any other user or administrator is needed.\nS:U - The undersized CWSR area and the resulting firmware overrun stay within the kernel/GPU driver security authority of the same machine; there is no hypervisor or IOMMU boundary crossed.\nC:H - With validation bypassed, CP firmware save/restore reads span memory adjacent to the tiny validated buffer and load it into wave state the attacker\u0027s shader can read back, and get_wave_state copies per-XCC control-stack contents out of the unvalidated region, giving a broad out-of-bounds disclosure primitive.\nI:H - The queue is programmed with the full unwrapped save size and per-XCC base offsets, so firmware performs large out-of-bounds writes of wave/control-stack data beyond the buffer that was actually validated and reference-counted, and the bypassed queue_refcount lets those buffers be unmapped or freed while the queue is live \u2014 an attacker-influenced memory-corruption primitive.\nA:H - Overrunning the CWSR save area drives the GPU into unmapped VA on preemption, causing VM faults, queue hangs and driver-initiated GPU resets that take down all GPU workloads on the machine, including other tenants on shared compute nodes."
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only through the DRM_IOCTL_AMDGPU_CTX ioctl on a local /dev/dri/renderD* or card* node (registered DRM_AUTH|DRM_RENDER_ALLOW in amdgpu_drv.c:3063), and the racing writer is the local sysfs power_dpm_force_performance_level path. No network or adjacent-network path reaches amdgpu context pstate handling.\nAC:L - The attacker owns both sides of the race \u2014 one thread loops AMDGPU_CTX_OP_SET_STABLE_PSTATE and context free while another loops AMDGPU_CTX_OP_ALLOC_CTX \u2014 and can retry indefinitely. The dangling-pointer variant (fini re-assigning adev-\u003epm.stable_pstate_ctx = ctx just before kfree) needs no race at all: once latched, every later context creation dereferences freed memory deterministically.\nPR:L - No capability or authorization check exists anywhere on the path (amdgpu_ctx_ioctl -\u003e amdgpu_ctx_alloc/amdgpu_ctx_stable_pstate -\u003e amdgpu_ctx_init); an unprivileged local user only needs an open render node fd, which is routinely granted to desktop users in the render/video group, to containers, sandboxed GPU processes, and to ordinary apps on Android/Chrome OS.\nUI:N - The attacker triggers everything with its own ioctls on its own file descriptors and its own threads; no action by another user or administrator is required, and the crash or freed-object read happens synchronously in the attacker\u0027s own syscall.\nS:U - The corrupted state (adev-\u003epm.stable_pstate_ctx and the freed struct amdgpu_ctx) and all consequences stay within the kernel of the machine running the amdgpu driver; no VM, IOMMU, or sandbox security boundary is crossed.\nC:H - amdgpu_ctx_init() dereferences a stale adev-\u003epm.stable_pstate_ctx pointer after the context has been kfree()d, reading a field out of a freed kmalloc object that the attacker can reclaim and control via heap spraying; per kernel scoring guidance a use-after-free is treated as High since freed-object access can be leveraged toward kernel memory disclosure.\nI:H - The unlocked read/write of the global pstate-owner pointer leaves a dangling kernel pointer in adev-\u003epm.stable_pstate_ctx and lets a freed, attacker-reclaimable object drive amdgpu_dpm_force_performance_level(); the commit also documents context teardown trampling the DPM configuration set through root-only sysfs, so an unprivileged user corrupts privileged device state.\nA:H - The unlocked check-then-use of adev-\u003epm.stable_pstate_ctx yields a NULL pointer dereference when a concurrent fini or sysfs write clears it, and the stale-pointer case faults on freed or unmapped slab memory \u2014 either produces a kernel oops and a wedged GPU, repeatable at will by an unprivileged local user."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:02:06.886Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/23a8726e1d7597fe7c9a59d5dc42ba8b7d345b8a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e06c39cc1c48dca68a5ffd971c23025a52d46634"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f9c88eb298c54348be3ca4087f4f4c615065b87"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1dc4ccb82c9e56325d8e7514ca4c90bd1efb351"
        }
      ],
      "title": "drm/amdgpu: Fix context pstate override handling",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68273",
    "datePublished": "2026-08-10T12:01:48.734Z",
    "dateReserved": "2026-07-30T09:28:09.379Z",
    "dateUpdated": "2026-08-17T05:02:06.886Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}